[
  {
    "molid": "mol38623",
    "smiles": "O=CC(=O)NO",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=CC(=O)NO",
        "std_free_energy": -4.598332405090332,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=CC(=O)[N-]O",
        "std_free_energy": -1.955186367034912,
        "relative_population": 0.44123362856223547
      },
      {
        "id": "-1_2",
        "charge": -1,
        "smiles": "O=CC(=O)N[O-]",
        "std_free_energy": -2.191343307495117,
        "relative_population": 0.5587663714377644
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 8.64999961853027,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]